arafat died in 2004 in paris. a documentary by the tv network al jazeera prompted investigators to reopen his case. it said traces of highly toxic radioactive pu loan you mean had been detected on arafat's clothing and other personal belongings and even to this day the cause of arafat's death has not been determined. some palestinians claim he was assassinated by israel. israeli officials deny the claim. >> translator: the palestinians are confident that israel is behind the whole thing. we need to prove this to the rest of the world. >> experts from a swiss laboratory and others will conduct a detailed examination of the samples. they will take several months to conclude and clear up questions of arafat's death. palestinian authorities are determined to get to the bottom of this mystery. nhk world, ramallah. >>> delegates at the u.n. conference on climate change are trying to agree on what to do about global warming. it is becoming clear the climate for compromise has chilled. industrialized countries commitments